Bike rentals/baby carriers

[lmk]

I know someone had asked about this recently but I can't seem to find the thread. We're bringing out 16 month old and would like to rent bikes - can someone tell me if the resorts (we're staying at WL and AK) have baby bike seats or the carriers that you attach to the back of your bike?? Also, do the bike rental places at these resorts provide helmets or should we bring out own? Many thanks!